1.4501 / X2CrNiMoCuWN25-7-4 - 1.4410 / X2CrNiMoN25-7-4 - Acid-resistant ferrite-austenitic super duplex steel, chromium-nickel-molybdenum with addition of nitrogen, or nitrogen, copper and tungsten according to EN 10088-1.

 

Standards Steel Grades
Chemical Composition %
C: Mn: Si: P: S: Cr: Mo: Ni: Cu: N: W:
DIN
EN
1.4501 - X2CrNiMoCuWN25-7-4 - 4501
<0.03 <1.0 <1.00 <0.035 <0.015 24.0 - 26.0 3.0 - 4.0 6.0 - 8.0 0.5 - 1.0 0.20 - 0.30 0.5 - 1.0
GOST 02Ch25N7M4 - 02Х25Н7М4
<0.03 <1.0 <1.00 <0.030 <0.010 24.0 - 26.0 3.0 - 4.0 6.0 - 8.0 0.5 - 1.0 0.20 - 0.30 0.5 - 1.0
UNS
ASTM
S32760 - S 32760 - F55 - F 55 - S39276
<0.03 <1.0 <1.00 <0.030 <0.010 24.0 - 26.0 3.0 - 4.0 6.0 - 8.0 0.5 - 1.0 0.20 - 0.30 0.5 - 1.0
ISO CrNiMo 25-7-4 - CrNiMo25-7-4
<0.03 <1.0 <1.00 <0.030 <0.010 24.0 - 26.0 3.0 - 4.0 6.0 - 8.0 0.5 - 1.0 0.20 - 0.30 0.5 - 1.0
UNS
ASTM
S32750 - S 32750 - S39275 - F 53 - F53 - 2507
<0.03 <1.2 <0.80 <0.035 <0.020 24.0 - 26.0 3.0 - 5.0 6.0 - 8.0 <0.50 0.24 - 0.32 -
GOST 02Ch25N7M3 - 02Х25Н7М3
<0.03 <1.0 <0.75 <0.030 <0.030 24.0 - 26.0 2.5 - 3.5 5.5 - 7.5 0.2 - 0.8 0.10 - 0.30 0.1 - 0.5
UNS
ASTM
ACI
J93380 - A 781 Grade 6A - 25Cr-7Ni-Mo-N - CD3MWCuN
<0.03 <1.0 <1.00 <0.025 <0.030 24.0 - 26.0 3.0 - 4.0 6.5 - 8.5 0.5 - 1.0 0.20 - 0.30 0.5 - 1.0
ČSN
STN
ČSN 42 2942
<0.20 <1.5 <2.00 <0.045 <0.040 18.0 - 20.0 2.0 - 2.5 9.0 - 11.0 - - -
UNI 329 S - 329S
<0.03 0.4 - 1.0 0.20 - 0.70 <0.030 <0.010 24.5 - 26.0 3.0 - 4.0 6.5 - 7.0 0.5 - 1.0 0.20 - 0.30 0.5 - 1.0
DIN
EN
X2CrNiMoN25-7-4 - 1.4410 - 4410
<0.03 <2.0 <1.00 <0.035 <0.015 24.0 - 26.0 3.0 - 4.5 6.0 - 8.0 - 0.20 - 0.35 -
AFNOR Z3CNDU25-06AZ - Z 3 CNDU 25-06 Az
<0.03 <2.0 <0.75 <0.030 <0.010 24.0 - 26.0 3.5 - 4.3 5.0 - 7.0 1.0 - 2.0 0.24 - 0.35 -

 

Super Duplex X2CrNiMoN25-7-4 i X2CrNiMoCuWN25-7-4 - description and specification

High-alloy stainless steel with two-phase structure consisting of 25% chromium, 3.6% nickel concentration, and special alloying additives depending on the grade variation. Steel X2CrNiMoCuWN25-7-4 compared to X2CrNiMoN25-7-4, has in its chemical composition tungsten and copper addition.

Besides from that, the two grades do not differ too much in the concentration of other chemical elements. Steel 1.4501 exhibits high strength, resistance to high salt concentrations and low sensitivity to salt compounds at elevated temperatures. In addition, it retains crack corrosion resistance, fatigue, pitting corrosion and intercrystalline corrosion resistance.

The addition of copper - Cu increases the resistance of the species to sulfuric acid, which is also used in the mining industry for the sulfuric acid leaching equipment.

Super Duplex steels also find applications in the chemical, paper, cryogenic and power industries for parts and subassemblies such as pumps, shafts, bushes, aerial constructions, heat exchangers, coolers, chemical transport pipelines, special tanks, valves, snd screws. The Super Duplex steels described above are subject to hyperquenching at temperatures between 1020 and 1100 ℃.


Mechanical and physical properties of Super Duplex 1.4410 and 1.4501 steels

  • Tensile strength Rm = 730 - 930 MPa
  • Yield point Re = > 530 MPa
  • Heat capacity cp = 500 J ⋅ ​kg-1 ⋅ K-1
  • Modulus of elasticity E = 200 GPa
  • Heat conductivity λ = 15 W ⋅ m-1 ⋅ K-1
  • Elongation A = >25%
  • Density ρ = 7,80 kg/dm3
  • Hardness <290 HB

 


Mechanical properties for specific temperatures:

Properties Temperatures
100℃ 200℃ 300℃ 400℃ 500℃
Modulus of elasticity - E 194 GPa 186 GPa 180 GPa - -
Linear Expansion Factor - α 13.0 ⋅ K-1 13.5 ⋅ 10-6 ⋅ K-1 14.0 ⋅ 10-6 ⋅ K-1 - -
Yield point - Re > 450 MPa > 400 MPa - - -

 


In the 1.4501 and 1.4410 grades Virgamet company supplies:

 


THIS WEBSITE USES COOKIES TO IMPROVE AND FACILITATE YOUR ACCESS TO THE WEBSITE AND TO KEEP STATISTICS. IF YOU CONTINUE TO USE THIS SITE, YOU AGREE THAT THE COOKIES WILL BE STORED ON YOUR DEVICE
PRIVACY POLICY
How do I disable cookies
AGREE